37 CFR 1.56: Duty to disclose information material to patentability
Taken from the Ninth Edition of the MPEP, published in March 2014
1.56 Duty to disclose information material to patentability.
[Editor Note: Para. (c)(3) below is applicable only to patent applications filed under 35 U.S.C. 111(a) or 363 on or after September 16, 2012*]
by its very nature is affected with a public interest. The
public interest is best served, and the most effective patent
examination occurs when, at the time an application is being
examined, the Office is aware of and evaluates the teachings of
all information material to patentability. Each individual
associated with the filing and prosecution of a patent
application has a duty of candor and good faith in dealing with
the Office, which includes a duty to disclose to the Office all
information known to that individual to be material to
patentability as defined in this section. The duty to disclose
information exists with respect to each pending claim until the
claim is cancelled or withdrawn from consideration, or the
application becomes abandoned. Information material to the
patentability of a claim that is cancelled or withdrawn from
consideration need not be submitted if the information is not
material to the patentability of any claim remaining under
consideration in the application. There is no duty to submit
information which is not material to the patentability of any
existing claim. The duty to disclose all information known to be
material to patentability is deemed to be satisfied if all
information known to be material to patentability of any claim
issued in a patent was cited by the Office or submitted to the
Office in the manner prescribed by §§ 1.97(b)-(d)
However, no patent will be granted on an application in
connection with which fraud on the Office was practiced or
attempted or the duty of disclosure was violated through bad
faith or intentional misconduct. The Office encourages
applicants to carefully examine:
- (1) Prior art cited in search reports of a foreign patent office in a counterpart application, and
- (2) The closest information over which individuals associated with the filing or prosecution of a patent application believe any pending claim patentably defines, to make sure that any material information contained therein is disclosed to the Office.
this section, information is material to patentability when it
is not cumulative to information already of record or being made
of record in the application, and
- (1) It establishes, by itself or in combination with other information, a prima facie case of unpatentability of a claim; or
refutes, or is inconsistent with, a position the applicant
- (i) Opposing an argument of unpatentability relied on by the Office, or
- (ii) Asserting an argument of patentability.
A prima facie case of unpatentability is established when the information compels a conclusion that a claim is unpatentable under the preponderance of evidence, burden-of-proof standard, giving each term in the claim its broadest reasonable construction consistent with the specification, and before any consideration is given to evidence which may be submitted in an attempt to establish a contrary conclusion of patentability.
Individuals associated with the filing or prosecution of a
patent application within the meaning of this section
- (1) Each inventor named in the application;
- (2) Each attorney or agent who prepares or prosecutes the application; and
- (3) Every other person who is substantively involved in the preparation or prosecution of the application and who is associated with the inventor, the applicant, an assignee, or anyone to whom there is an obligation to assign the application.
- (d) Individuals other than the attorney, agent or inventor may comply with this section by disclosing information to the attorney, agent, or inventor.
- (e) In any continuation-in-part application, the duty under this section includes the duty to disclose to the Office all information known to the person to be material to patentability, as defined in paragraph (b) of this section, which became available between the filing date of the prior application and the national or PCT international filing date of the continuation-in-part application.
[42 FR 5593, Jan. 28, 1977; paras. (d) & (e) - (i), 47 FR 21751, May 19, 1982, effective July 1, 1982; para. (c), 48 FR 2710, Jan. 20, 1983, effective Feb. 27, 1983; paras. (b) and (j), 49 FR 554, Jan. 4, 1984, effective Apr. 1, 1984; paras. (d) and (h), 50 FR 5171, Feb. 6, 1985, effective Mar. 8, 1985; para. (e), 53 FR 47808, Nov. 28, 1988, effective Jan. 1, 1989; 57 FR 2021, Jan. 17, 1992, effective Mar. 16, 1992; para. (e) added, 65 FR 54604, Sept. 8, 2000, effective Nov. 7, 2000; para. (c)(3) revised, 77 FR 48776, Aug. 14, 2012, effective Sept. 16, 2012]
[* The changes to para. (c)(3) effective Sept. 16, 2012 are applicable only to patent applications filed under 35 U.S.C. 111(a) or 363 on or after Sept. 16, 2012. See § 1.56 (pre-AIA) for para. (c)(3) otherwise in effect.]